FNB how can we help you.....yeah right!

28th of December I raised a dispute for R500 going out of my bank account without confirmation and a Otp,via the fnb app,received a reference number.A few days later I checked in via contacting my bankers to find out the status where I was told that I had to fill out a form.I filled out the form on the 30th December and mailed it to them,still no responce to date. I then sent a message on Facebook where I was then contacted by fnb assuring me that the matter will be sorted....haaa has still not,not even a call from my bank whom I have been with for years never the less having a business bank account with them. I was them messaged a few days later by a hacker who wanted my app details and wanted to use team viewer to do my refund!. 2 days ago more funds went out my account when I contacted my banker I was told to contact the disputes department.I am now at my wits end with Fnb as if they sorted out the first issue then the second would have not occurred.Why are they not helpful at all?!!!!